typing for all functions

[DaJansenGit]

at least in core (bim2sim main without plugins)

[DaJansenGit]

A good example is this:

    def get_ifc_types(self, relevant_elements: List[Type[ProductBased]]) \
            -> Set[str]:
        """Extract used ifc types from list of elements."""
        relevant_ifc_types = []
        for ele in relevant_elements:
            relevant_ifc_types.extend(ele.ifc_types.keys())
        return set(relevant_ifc_types)

[DaJansenGit]

In some cases it might make sense to use TYPE_CHECKING to prevent circular imports

from typing import TYPE_CHECKING

if TYPE_CHECKING:
   import ...

please check google to find out why and how this works ;)